Do you have a Duratec V6? If you do it's called "moosing". It can be fixed by replacing the idle air control valve. It's nothing serious, just loud and embarrassing.
If it sounds like its coming from inside the car its probably the fuel pump if not its kind of hard to say.
Check your fuel pump
sounds like a vacuum leak some where in the system
that could be a wheel bearing that's gone bad.
From the sound its wings make from flapping so fast. It sounds like they are humming.
The constant humming sound from the machine could be caused by a malfunctioning motor or fan, loose components, or an issue with the power supply.
I wonder if your a/c compressor is going on the blink? If you can disconnect it somehow, does the humming stop?
Hummingbirds got their name from the humming sound their wings make as they beat rapidly in flight, which can sound like a hum. This noise is created by the rapid movement of the wings and is a key characteristic of these small birds.
Since Blu-Rays take a while to load the disc, there will be sounds such as humming and even sometimes some clicking, but these are perfectly normal
A humming bird
The speed of sound depends on what the sound is going through, not on what created the sound. If sounds from different sources had different speeds, then there could never be a band, orchestra, or choir.
sounds like tire/road noise